All Tek-Lights, New Wave® 42, 44, 48 have program start ballasts. New Wave® 22, 24, 28 and Sun Blaze® 22, 24, 44, 48 have instant start ballasts.
Excellent quality, reliable socket UL listed component
Rotate lamp 90 degrees to lock in place
Program start ballasts require non-shunted sockets.
Instant start ballasts require shunted sockets.